On Instagram, Swift thanked the band for joining her for the “60,000 person dance party.”

Swift has been bringing out special guests at all her tour stops. In addition to Walk the Moon, she’s done duets with Sam Hunt (“Take Your Time,” in Chicago), Nick Jonas and The Weeknd at her New York-area shows (for “Jealous” and “I Can’t Feel My Face,” respectively), and Lorde (“Royals” in Washington, D.C.), among others. Her “Bad Blood” BFFs and other famous faces have also walked Swift’s on-stage runway at various stops throughout the tour.